SOME of America’s leading billionaires have met secretly to consider how their wealth could be used to slow the growth of the world’s population and speed up improvements in health and education.

The philanthropists who attended a summit convened on the initiative of Bill Gates, the Microsoft co-founder, discussed joining forces to overcome political and religious obstacles to change.

Described as the Good Club by one insider it included David Rockefeller Jr, the patriarch of America’s wealthiest dynasty, Warren Buffett and George Soros, the financiers, Michael Bloomberg, the mayor of New York, and the media moguls Ted Turner and Oprah Winfrey.

These members, along with Gates, have given away more than £45 billion since 1996 to causes ranging from health programmes in developing countries to ghetto schools nearer to home.

They gathered at the home of Sir Paul Nurse, a British Nobel prize biochemist and president of the private Rockefeller University, in Manhattan on May 5. The informal afternoon session was so discreet that some of the billionaires’ aides were told they were at “security briefings”.

Stacy Palmer, editor of the Chronicle of Philanthropy, said the summit was unprecedented. “We only learnt about it afterwards, by accident. Normally these people are happy to talk good causes, but this is different – maybe because they don’t want to be seen as a global cabal,” he said.